e966125d62
* Adds implementations of embedded-storage and embedded-storage-async for QSPI * Add blocking implementations of QSPI * Use blocking implementation in new() and embedded-storage impls * Use async implementation in embedded-storage-async impls * Add FLASH_SIZE const generic parameter * Own IRQ in Qspi to disable it on drop
79 lines
2.1 KiB
Rust
79 lines
2.1 KiB
Rust
#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use defmt::{assert_eq, info, unwrap};
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use embassy::executor::Spawner;
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use embassy_nrf::Peripherals;
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use embassy_nrf::{interrupt, qspi};
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use defmt_rtt as _; // global logger
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use panic_probe as _;
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const PAGE_SIZE: usize = 4096;
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// Workaround for alignment requirements.
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// Nicer API will probably come in the future.
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#[repr(C, align(4))]
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struct AlignedBuf([u8; 4096]);
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#[embassy::main]
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async fn main(_spawner: Spawner, p: Peripherals) {
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// Config for the MX25R64 present in the nRF52840 DK
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let mut config = qspi::Config::default();
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config.read_opcode = qspi::ReadOpcode::READ4IO;
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config.write_opcode = qspi::WriteOpcode::PP4IO;
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config.write_page_size = qspi::WritePageSize::_256BYTES;
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let irq = interrupt::take!(QSPI);
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let mut q: qspi::Qspi<_, 67108864> = qspi::Qspi::new(
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p.QSPI, irq, p.P0_19, p.P0_17, p.P0_20, p.P0_21, p.P0_22, p.P0_23, config,
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);
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let mut id = [1; 3];
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unwrap!(q.custom_instruction(0x9F, &[], &mut id).await);
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info!("id: {}", id);
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// Read status register
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let mut status = [4; 1];
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unwrap!(q.custom_instruction(0x05, &[], &mut status).await);
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info!("status: {:?}", status[0]);
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if status[0] & 0x40 == 0 {
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status[0] |= 0x40;
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unwrap!(q.custom_instruction(0x01, &status, &mut []).await);
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info!("enabled quad in status");
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}
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let mut buf = AlignedBuf([0u8; PAGE_SIZE]);
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let pattern = |a: u32| (a ^ (a >> 8) ^ (a >> 16) ^ (a >> 24)) as u8;
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for i in 0..8 {
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info!("page {:?}: erasing... ", i);
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unwrap!(q.erase(i * PAGE_SIZE).await);
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for j in 0..PAGE_SIZE {
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buf.0[j] = pattern((j + i * PAGE_SIZE) as u32);
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}
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info!("programming...");
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unwrap!(q.write(i * PAGE_SIZE, &buf.0).await);
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}
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for i in 0..8 {
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info!("page {:?}: reading... ", i);
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unwrap!(q.read(i * PAGE_SIZE, &mut buf.0).await);
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info!("verifying...");
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for j in 0..PAGE_SIZE {
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assert_eq!(buf.0[j], pattern((j + i * PAGE_SIZE) as u32));
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}
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}
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info!("done!")
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}
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